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H. E. DOERR.

RAILWAY CAR TRUCK.

APPLICATION FILED MAY 25,1914

1,1 17, 1 70. Patented Nov. 17, 1914.

jfaziyfljoeiir Another object isto provides. car truck in -msnr 1:- 3 933 10.1 r- Mm,-

a swam cem nt. or. sir,

To all wiiom itmay concern;

Be it known that 1,.HA3RY E. Donne, a

citizen of the United States, residing at 'St- Louis, Missouri, have invented a certain new and useful Improvement 1n Railway-Car Trucks, of. which the followin is al till, clear, and exact description, suc as will en able her i l d nth en t w i h i 6? pertainsi'to mgkesnd thesan e. I

I Thisjinvent on relates: to car trucks, and has for its mam-.Qbpct-to prov de a car truck in whichtheside frames are connected the side framesare free .to rock to the spring plank in such amanner that or twist slightly-independently of said spring plank.

4 which the spring plank is :eflic'iently connected to the side frames without the use of bolts, rivets .or similar fastening devices.

. 2-2 of Fig. 1.

Other objects and desirable features of-nly invention will be hereinafter pointed out.

Figure 1 of the drawings s a side elevational view of a. c'ar truck .constructed in accordance with my invention. Fig. 2 is a transverse sectional view taken on the line Figs. 3 and 4 are transverse sectional views similarto Fig. 2, illustrating slightly modified forms .ofmy invention.

Fig. 5 is a perspective view of a portionof the side frame; and g t i$ an inverted perspective View of a portion of the spring plank. I

Referring to Figs. 1,2, 5' and 6 of the drawin s which illustrate the preferred.

form 0 my invention, A designates a cast metal side frame provided with a bolsterreceiving opening 1, and 2 designates the spring plank that extends between a pair of side frames which constitute a complete truck. In the drawings I have'illustrated only one side frame and a portion of the spring plank, it being. understood that the connection between each of the side frames and the spring plank in a complete truck is the same.

Briefly stated, my invention consists in providing a convex rotube'rance or crowned boss on the lower ace of the spring plank that fits into and cooperates with a correspondingly curved or concave recess formed in the lower portion of the bolster-receiving opening of the side frame. In'the preferred form of my invention herein shown the Speelflcatleii of Lettershtent. .-maa na enar-a Wigwam-mm Swiss P131111.I d i was mended adamanta h end with' an ntegral seate Nevinnia;

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som boss t atfitsin and coiiperateswith v aw esron ing s a pa e recess 4 formed M e l wenrott n e bolsterre ein arpenies l fifths era .A I

By. sfij ng t rain mee n i fram the frames ardheldspacd'aPMt at a roper. dis a -end w was th -i through the medium of thebolstemsupportng springs keeps the boss 3' pro erly' sented 1n the recess 4, the spherical -surf .e manne J st sc bed th sid 1 olster.

as arsed;

bas and mess all w-ins t id were I twis r r k S elav. with respee to ea h other, due to any inequa lities'in the...road bed, without exerting any twisting strain. on

ment of the side frame with respect to" the spring plank, but said projection will prevent the spring plank from being-forced laterally or overthrown out of its normal position in said side frame.

From the foregoing itwill be seen that I have produced a car truck wherein the side frames are permitted to rock independently Mallsrof the recess 6 to allow a slight move- 0f the spring plank and the connection between the side-frames and the spring plank is such as to permit of the read removal or insertion of the spring plank rom or into operative position in the side frame without the use of bolts, rivets or similar fastening devices. The boss 3 and recess 4 are of ample proportions to insure suflicient side frames, and a car truck embodyin the features herein described can 'be pro need at a lower cost of manufacture than.-- the old styles of trucks, owing to the fact that there strength in the truck at the oint of connection between the spring p ank and the side frame and spring plank.

' ster'receiving opening Having in said side frame.

are no separate parts added to the truck a in order' -to 'ohtain the, desirable results ofthis revenues,

. In some instances the pro'ection 5 and correspondin' recess $5 can eliminated without sacri cingany of the good features of my invention, such a construction whereinthe spring plank 23 is provided. with. rate" convex boss- '3" that coiiperates with a correspondingly shaped depression? formed in the lower portion of the bolster-receiving op ening' 1 of the side frame A, 4

n i g. 4 I have illustrated a construction wherein the body portion of the sprin plank is formed from a commercially rolle channel 2, and the convex bosses '3" are cast integral with plates 7 that are attached to the underside of the channel 2" in any suitable manner, such as bymeans of the rivets 8. 7

thus described my invention, what Iclaimisz' 1. 'In a car truck, aside frame,'a spring plank, and a substantially semi-spherical portion on one of said members that cooperates with an o positely curved portion on the other of sai members.

2. In a car truck, a side frame, .a spring lank, and a substantially semi-spherical hose on said spring plank that (306' crates wiiiha corresponding y shaped-seat ormed 3. In a car truck, a side frame, aspring plank, and a universal 'joint between said 4. In a car truck, a side frame provided with a bolster-receivin opening, said bolavin an approximately semi-spherical depression in its lower and in Fig 3 I haveshown a smooth-or imperfomeans ression in .the lower portion thereof, a

P spring plank provided with a convex boss t at 006 crates with said depression, and

or from being tive osition with reventing said spring plank creed laterally out of operarespect to said side frame.

6. n a car truck, a cast metal side frame 'rovide'd with a bolster-receiving opening aving a circular concave recess in thelower ortion thereof, and a cast metal spring plank having an integral convex boss on theunderside vthereof thattcoiipera-tes with said recess.

7. In a car truck, a side frame provided with a concave recess, a spring plank provided with a convex boss that fits in said recess, and a projection in said recess that cooperates with a' hole formed in said boss.

8. In a car truck, a side frame provided with a bolster-receiving opening, said bolster-receiving opening eing provided with .a circular'concave depression in its lower portion, a spring plank whose lower face is spaced away rom the lower portion of said bolster-recei ing with a circular oss pression.

In testimony whereof I hereunto afiix my signature in the presence of two witnesses, this twentieth day of Ma 1914.

- HAR Y E. DOERR.

that fits into said deopening and provided 

